High-stability water-based emulsion and preparation method thereof

Abstract

The invention provides a high-stability water-based emulsion and a preparation method thereof, and the water-based emulsion comprises the following raw materials by mass: 30%-40% of naphthenic base oil, 2%-5% of an antirust agent, 1%-4% of N, N-dimethylformamide, 1%-5% of an emulsifier, 2%-7% of oleic acid, 1%-5% of Span 80, 2%-5% of NP-4, 0.5%-1.5% of a corrosion inhibitor, 2%-6% of a bactericide, 0.1%-1% of an antifoaming agent, and the balance of water. The water-based emulsion is obtained through formula optimization, the proper raw materials are compounded according to a specific proportion, the stability of the water-based emulsion can be effectively improved, and it is guaranteed that the water-based emulsion has good lubricity and anti-rust performance. The water-based emulsion is simple in preparation method, can be widely applied to the fields of metal processing, spinning, leather, papermaking, coating and the like, and has a wide application prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of emulsions, and in particular relates to a high-stability aqueous emulsion and a preparation method thereof. Background Art

[0002] Aqueous emulsion is a mixture of water, emulsifier, base oil (such as mineral oil, vegetable oil or synthetic oil) and other additives. It is widely used in metal processing, textile, leather, papermaking, coating and other fields due to its unique properties. Especially in the field of metal processing, aqueous emulsion is often used as cutting fluid, coolant and lubricant to improve processing efficiency and workpiece quality.

[0003] However, aqueous emulsions have problems such as easy deterioration and corruption and poor stability during use. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a high-stability aqueous emulsion and a preparation method thereof, which can effectively solve the problems of easy deterioration and corruption of aqueous emulsions and poor stability, and has good lubricity and rust prevention properties.

[0005] To achieve the above purpose, the present invention adopts the following technical solution.

[0006] The first aspect of the present invention provides an aqueous emulsion, comprising the following raw materials in mass fractions: 30% to 40% of cycloalkyl base oil, 2% to 5% of rust inhibitor, 1% to 4% of N,N-dimethylformamide, 1% to 5% of emulsifier, 2% to 7% of oleic acid, 1% to 5% of Span 80, 2% to 5% of NP-4, 0.5% to 1.5% of corrosion inhibitor, 2% to 6% of bactericide, 0.1% to 1% of defoamer, and the balance is water.

[0007] In some embodiments, the aqueous emulsion comprises the following raw materials in mass fractions: 33% to 37% cycloalkyl base oil, 2% to 4% rust inhibitor, 2% to 3% N,N-dimethylformamide, 1% to 3% emulsifier, 3% to 5% oleic acid, 1% to 3% Span 80, 2% to 3% NP-4, 0.5% to 1% corrosion inhibitor, 2% to 4% bactericide, 0.5% to 1% defoamer, and the balance is water.

[0008] In some embodiments, the rust inhibitor is selected from at least one of sodium carbonate and triethanolamine.

[0009] In some embodiments, the emulsifier is selected from one of tall oil diisopropanolamide, tall oil monoisopropanolamide, fatty acid amide polyoxyethylene ether, and dodecyl polyoxyethylene ether triethanolamine sulfate.

[0010] In some embodiments, the corrosion inhibitor is selected from at least one of phenol ether phosphate, fatty alcohol ether phosphate, isotridecanol ether phosphate potassium salt, lauryl phosphate and isotridecanol ether phosphate.

[0011] In some embodiments, the fungicide is selected from at least one of 5-methyloxazoline, phenylisothiazolinone, iodopropynylbutylcarbamate, phenoxyethanol, and methylisothiazolinone.

[0012] In some embodiments, the defoaming agent is selected from at least one of methyl silicone oil and dimethyl silicone oil.

[0013] The second aspect of the present invention provides a method for preparing the aqueous emulsion as described above, characterized in that it comprises the following steps: (1) taking the water, emulsifier, and cycloalkyl base oil in proportion and stirring them evenly; (2) adding the remaining raw materials, stirring them evenly, and filtering to obtain the aqueous emulsion.

[0014] The third aspect of the present invention provides the use of the aqueous emulsion as described above in the fields of metal processing, textiles, leather, papermaking, and coatings.

[0015] In some embodiments, the use includes use as a metal cutting fluid.

[0016] The invention obtains an aqueous emulsion through formula optimization, and by compounding suitable raw materials according to a specific ratio, the stability of the aqueous emulsion can be effectively provided, and the aqueous emulsion can be ensured to have good lubricity and rust prevention performance.

[0017] The aqueous emulsion of the invention has a simple preparation method and can be widely used in the fields of metal processing, textile, leather, papermaking, coating, etc., and has broad application prospects. DETAILED DESCRIPTION

[0018] For ease of understanding of the present invention, the present invention will be described more fully below with reference to the embodiments, and preferred embodiments of the present invention are given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. It should be understood that the experimental methods in the following examples that do not specify specific conditions are usually based on conventional conditions or the conditions recommended by the manufacturer. The various commonly used reagents used in the embodiments are all commercially available products.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] Example 1

[0021] The present embodiment provides an aqueous emulsion, comprising the following raw materials in mass fractions: 35% of cycloalkyl base oil, 4% of triethanolamine, 3% of N,N-dimethylformamide, 2% of tall oil diisopropanolamide, 5% of oleic acid, 2% of Span 80, 3% of NP-4, 1% of fatty alcohol ether phosphate, 4% of phenoxyethanol, 0.5% of methyl silicone oil, and the balance is water.

[0022] Example 2

[0023] The present embodiment provides an aqueous emulsion, comprising the following raw materials in mass fractions: 37% of cycloalkyl base oil, 7% of triethanolamine, 3.5% of N,N-dimethylformamide, 1.5% of tall oil diisopropanolamide, 6% of oleic acid, 3% of Span 80, 4% of NP-4, 1.5% of fatty alcohol ether phosphate, 5% of phenoxyethanol, 0.8% of methyl silicone oil, and the balance is water.

[0024] Example 3

[0025] The present embodiment provides an aqueous emulsion, comprising the following raw materials in mass fractions: 33% cycloalkyl base oil, 5% triethanolamine, 2% N,N-dimethylformamide, 3% tall oil diisopropanolamide, 3% oleic acid, 4% Span 80, 2% NP-4, 0.5% fatty alcohol ether phosphate, 2% phenoxyethanol, 1% methyl silicone oil, and the balance is water.

[0026] Comparative Example 1

[0027] This comparative example provides an aqueous emulsion, which is the same as Example 1 except that NP-4 is not added, and specifically comprises the following raw materials by mass fraction: 35% of cycloalkyl base oil, 4% of triethanolamine, 3% of N,N-dimethylformamide, 2% of tall oil diisopropanolamide, 5% of oleic acid, 2% of Span 80, 1% of fatty alcohol ether phosphate, 4% of phenoxyethanol, 0.5% of methyl silicone oil, and the balance is water.

[0028] Comparative Example 2

[0029] This comparative example provides an aqueous emulsion, which is the same as Example 1 except that Span 80 is not added, and specifically comprises the following raw materials by mass fraction: 35% cycloalkyl base oil, 4% triethanolamine, 3% N,N-dimethylformamide, 2% tall oil diisopropanolamide, 5% oleic acid, 3% NP-4, 1% fatty alcohol ether phosphate, 4% phenoxyethanol, 0.5% methyl silicone oil, and the balance is water.

[0030] The aqueous emulsions in the above examples and comparative examples are prepared by the following method: (1) taking the water, emulsifier, and cycloalkyl base oil in proportion and stirring them evenly; (2) adding the remaining raw materials, stirring them evenly, and filtering to remove impurities and particles to obtain the aqueous emulsions.

[0031] The relevant properties of the aqueous emulsions in the above embodiments and comparative examples were tested:

[0032] Stability: Test according to Appendix A of SH / T0365 standard, as follows: Weigh 5g of sample, accurate to 0.1g, place in a stoppered measuring cylinder, then add water with a hardness of 6000ppm to the 100mL mark, cover tightly and shake for 1min, then use a pipette to draw 50mL of emulsion into a 50mL burette, and observe the volume (mL) of soap or oil layer after 24h. Soap: a layer of white ester on the top of the emulsion, oil layer: if the upper precipitate is a brownish-yellow transparent liquid, it is the oil layer.

[0033] Other properties: GB / T 6144-2010 standard.

[0034] Fill in the results in Table 1.

[0035] Table 1

[0036]

[0037] The above results show that the aqueous emulsion of the present invention has good stability, lubricity and rust resistance. It is found during use that after being placed for a long time, it does not deteriorate, rot, or stink.

[0038] After extensive research, the present invention compounded suitable raw materials in a specific ratio to obtain the aqueous emulsion product. The raw materials in the product interact with each other to form a stable system, so that the product has good stability, lubricity and rust resistance. Changes in the raw materials in the formula will lead to degradation of the performance of the prepared product. For example, compared with Example 1, the aqueous emulsion of Comparative Example 1 does not contain NP-4, and the aqueous emulsion of Comparative Example 2 does not contain Span 80, resulting in decreased stability and lubricity of the prepared aqueous emulsion products.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An aqueous emulsion, characterized in that: The invention comprises the following raw materials in mass fraction: 30% to 40% of cycloalkyl base oil, 2% to 5% of rust inhibitor, 1% to 4% of N,N-dimethylformamide, 1% to 5% of emulsifier, 2% to 7% of oleic acid, 1% to 5% of Span 80, 2% to 5% of NP-4, 0.5% to 1.5% of corrosion inhibitor, 2% to 6% of bactericide, 0.1% to 1% of defoamer, and the balance is water.

2. The aqueous emulsion according to claim 1, characterized in that The invention comprises the following raw materials in mass fractions: 33% to 37% of cycloalkyl base oil, 2% to 4% of rust inhibitor, 2% to 3% of N,N-dimethylformamide, 1% to 3% of emulsifier, 3% to 5% of oleic acid, 1% to 3% of Span 80, 2% to 3% of NP-4, 0.5% to 1% of corrosion inhibitor, 2% to 4% of fungicide, 0.5% to 1% of defoamer, and the balance is water.

3. The aqueous emulsion according to claim 1 or 2, characterized in that The rust inhibitor is selected from at least one of sodium carbonate and triethanolamine.

4. The aqueous emulsion according to claim 1 or 2, characterized in that The emulsifier is selected from one of tall oil diisopropanolamide, tall oil monoisopropanolamide, fatty acid amide polyoxyethylene ether, and dodecyl polyoxyethylene ether triethanolamine sulfate.

5. The aqueous emulsion according to claim 1 or 2, characterized in that The corrosion inhibitor is selected from at least one of phenol ether phosphate, fatty alcohol ether phosphate, isotridecanol ether phosphate potassium salt, lauryl phosphate and isotridecanol ether phosphate.

6. The aqueous emulsion according to claim 1 or 2, characterized in that The bactericide is selected from at least one of 5-methyloxazoline, phenylisothiazolinone, iodopropynylbutylcarbamate, phenoxyethanol, and methylisothiazolinone.

7. The aqueous emulsion according to claim 1 or 2, characterized in that: The defoaming agent is selected from at least one of methyl silicone oil and dimethyl silicone oil.

8. The method for preparing an aqueous emulsion according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: (1) taking the water, emulsifier and cycloalkyl base oil in proportion and stirring them evenly; (2) adding the remaining raw materials, stirring them evenly and filtering them to obtain the product.

9. Use of the aqueous emulsion according to any one of claims 1 to 7 in the fields of metal processing, textiles, leather, papermaking and coatings.

10. The use according to claim 9, characterized in that Said applications include use as a metal cutting fluid.

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